TitaniumTT

I'm referring to being able to go into the PFC and pulling up the 2 or 3d map associated with ONLY the prespool valve and modifying it to suit your needs. From what I know about the PFC - this is not possible. It is with the Motec. I can also program in the charge control and the charge relief valves and I plan on running them as PWM's not simple on/off valves as mazda has them. I've had many lengthy discussions with Motec about this and they feel that while it is going to be an enorumous PITA - there is no reason for it not to work.

This is as much of an experiment as should be a blast to drive.

arghx

iTrader: (3)

^^ Explain to me the specific settings in the Datalogit that control 1. each individual solenoid and 2. under which conditions these solenoids will activate. Because I havent been able to find them.

slo

iTrader: (1)

The charge control and charge relief won't work as PWM's I've tried it.

The charge relief is no different from a blow off valve, it can't open halfway, its either closed or open with no in between. At best it can pulse at about 10 HZ.

The charge control must open as quickly as possible or the transition will be unpredictable across different throttle ranges/gears.

My best result was to control the CRV and CCV from the same output, the CRV will close just a hair faster than the CCV will open preventing either compressor surge or loss of boost, and from that same output I also controlled the TC gate, it seemed like these three things happening in tandem gave the best results opening th TC gate any earlier than the rest would cause a spike, opening it later would cause a dip.

Next if the motec can do it you want to control the precontrol and wastgate as independent cloosed loop boost circuits, providing you can map boost to RPM, you need 3 way solenoids for this and the need to be mounted close to the items there controlling.

The haltch can do it so I would imagine the motec can.

The best setup is to keep the wastgate closed and use the precontrol to control primary turbo boost as long as it can, (when its not able to thats a good point for the transition) then keep the pre control 100% open and use the wastgate to control boost further up.

Also keep in mind that the tuning and fuel requirement is going to radically change between 1 turbo and 2, thats a pretty good reason to always have the transition at the same RPM, otherwise it would be cool to vary the transition point by throttle IE keep it on 1 turbo if under 50% throtte, and boost as in prevent transition until 12 PSI is reached.

I was under the impression that the parameters associated with the PFC settings could be changed with datalogit, I may be wrong I'm using a haltech not a PFC.

slo

iTrader: (1)

I don't have a PFC I am using a haltech, I said that I was under the impression that these things could be controlled with the PFC.

TitaniumTT

I may just fly your *** out to CT in the near future. Last I check Jet blue was ~$185 into JFK from LBA

I was thinking about pulsing the CRV to build boost inside the pipe between the 2nd turbo and the CCV. I understand what you're saying about that valve and will keep than in mind for sure.

Interesting. I was hoping that there would be enough flow from the PC to build ~10psi from the secondary and then open the TC above the transistion.

That is exactely what we are going to be doing. In talking with the Motec guru's, thier new programming is such that "programs" can be written as opposed to 2 or 3d maps. What we are hoping to do it just like you said, use the PC as the WG while in primary mode. As boost builds is bleeds off the excess to spool the turbo. We are also going to run boost vs gear and boost vs TPS. (In addition we are going to pull a pressure signal from the exhaust mani to tune the effiency of the primary turbo on this engine. Remember the RE has WAY bigger intake runners than the REW. This type of programming from what I understand is something that only the Motec can do. Thier dealers are apparently required to take courses and end users can as well for ~$1000 for a two day course.) The thinking with all the different parameters is to give a more linear power delivery under your right foot. Oh, there is also a trim switch as well to dial in the boost even more. So, assuming that the trim switch is maxed @ 100% or 15PSI and you're in the higher gears - 3rd+ where there is no reduction in boost, we want to program the Motec to limit boost to say 11.25PSI (1/2 way between the 7.5 spring and the max 15PSI) when accelerating @ 1/2 throttle. Push the pedal even more and boost is allowed to build more giving more linear power delivery at any RPM's.

What we may try to incorporate on this level is using that pressure signal from the exhaust mani to dictate when the transistion occurs. In speaking with Motec the software can be told to do certain things at certain points meaning if the turbo isn't out of it's effiecency range at low loads but higher RPMS - why transition if it's not needed? That will only create lag. By keeping the 2ndary offline boost can build much much faster. Again all thoery which is why you're flying out

From my research - granted a few years ago - it cannot be done.

TitaniumTT

Oh - and my solenoids for the WG & PC. I've since removed the plug on the top and replaced it with a sintered filter to give a true 3way valve thus affording more adjustability

I also hunted down some bigger fittings so I converted it from the 3.5mm hose to the 6mm hose

slo

iTrader: (1)

For the three way pulsed valves, hook the filter side of the valve up to a "vacuum" port in front of the turbo's, the slight vaccum produced when boost is just building sucks the wastgate closed and is enough to give you 2-300 rpm better spool.

Keep in mind that exhaust pressure wants to open wastgates, I have infact run a turbo car with no line hooked up to the wastgate, exhaust pressure would self regulate boost. This was no rotary though.

TitaniumTT

Well don't you just ******* RULE! Nice tip. I never would've thought of that. I should still have those original 3.5 mm lines and I think I have a 3 way splitter that I was going to use.... but didn't. There is one feed on the primary turbo inlet duct that can be used as I don't think it has a purpose now. That right there is an AWESOME tip. So.... tune around April/May?